Portable compass



FIG. 1 is a top plan view of a portable compass showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image thereof;

FIG. 3 is a front elevational view thereof, the rear being a mirror image thereof;

FIG. 4 is a bottom plan view of FIG. 2. 

The ornamental design for a portable compass, as shown and described. 